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System and method for controlling construction machine

a technology of construction machinery and control system, which is applied in the direction of mechanical equipment, servomotors, transportation and packaging, etc., can solve the problems of deterioration in controllability, inefficient flow distribution, and fuel efficiency reduction, so as to improve fuel efficiency, increase working pressure, and save costs

Active Publication Date: 2021-04-20
DOOSAN INFRACORE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention relates to a control system for vehicles that allows for the efficient distribution and control of working oil. By reducing the orifice area of a control valve connected to a low-pressure actuator and increasing the working pressure for that actuator, the invention helps to control the distribution of working oil and improve fuel efficiency. Additionally, the invention allows for a meter-in control based on the load exerted on the actuator and the joystick displacement amount, which further improves fuel efficiency and controllability. The invention provides a cost-saving effect and prevents inefficient working oil distribution and pressure loss.

Problems solved by technology

However, inefficient flow distribution and deterioration in controllability may occur due to a fixed orifice area in the orifice structure, and when a relatively great load is exerted on the actuator, fuel efficiency may be decreased due to pressure loss.

Method used

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  • System and method for controlling construction machine
  • System and method for controlling construction machine
  • System and method for controlling construction machine

Examples

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Embodiment Construction

[0037]Various example embodiments will be described more fully hereinafter with reference to the accompanying drawings, in which example embodiments are shown. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to example embodiments set forth herein. Rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of example embodiments to those skilled in the art. In the drawings, the sizes and relative sizes of components or elements may be exaggerated for clarity.

[0038]It will be understood that when an element or layer is referred to as being “on,”“connected to” or “coupled to” another element or layer, it can be directly on, connected or coupled to the other element or layer or intervening elements or layers may be present. In contrast, when an element or layer is referred to as being “directly on,”“directly connected to” or “directly coupled to” anoth...

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PUM

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Abstract

A control system for construction machinery, includes a hydraulic pump, first and second actuators connected to the hydraulic pump through first and second parallel lines respectively, first and second control valves installed in the first and second parallel lines respectively and configured to control operations of the first and second actuators, first and second spool displacement adjusting valves configured to control displacement amounts of the spools of the first and second control valves, and a controller configured to output a control signal to the first and second spool displacement adjusting valves corresponding to a manipulation signal of an operator, and configured to limit a spool displacement amount of the second control valve according to the manipulation signal for the first actuator when the manipulation signal for a multiple operation of the first and second actuators is received.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This present application is a national stage filing under 35 U.S.C § 371 of PCT application number PCT / KR2017 / 009555 filed on Aug. 31, 2017 which is based upon and claims the benefit of priority to Korean Patent Application No. 10-2016-0111401 filed on Aug. 31, 2016 in the Korean Intellectual Property Office. The disclosures of the above-listed applications are hereby incorporated by reference herein in their entirety.TECHNICAL FIELD[0002]The present invention relates to a control system for construction machinery and a control method for construction machinery. More particularly, the present invention relates to a control system for construction machinery including an electro-hydraulic main control valve using an electro proportional pressure reducing valve and a control method for construction machinery using the same.BACKGROUND ART[0003]Recently, in construction machinery, an electro-hydraulic main control valve with an electro proporti...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): F15B11/16
CPCF15B11/162E02F9/2228E02F9/2235F15B21/087F15B2211/20576F15B2211/3116F15B2211/329F15B2211/327F15B13/0433F15B2211/30565F15B2211/31535F15B2211/31582F15B2211/6346F15B2211/781F15B2211/6313F15B2211/6309F15B21/082F15B2211/6658F15B2211/6654F15B2211/7142E02F9/2221E02F9/2267E02F9/2004F15B13/025B60Y2200/41B60Y2200/15
Inventor KIM, CHANG-MOOKJUNG, WOO-YONGAHN, HYEON-SIKKIM, KI-YONG
Owner DOOSAN INFRACORE CO LTD
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